The results of electrical exploration works in the area of Pauzhetsky and Nizhne-Koshelevsky geothermal deposits are presented. In 2012 y. works by VES method were carried out on the profile, crossing structures of Pauzhetsky deposit which were defined earlier. Sounding was made in 35 spots. In 2013 electrical exploratory works by VES method were carried out in the area of Nizhne-Koshelevsky geothermal deposit. Souding was made in 17 spots. Preliminary data of apparent resistance allocation to depth were drawn by results of the works. The areas permeable for hydrothermal liquors or gas-vapor heat-transfer were defined.

Tephrochronologic studies conducted in the Levaya Avacha River valley helped determine the true age of the Veer cinder cone, which formed approximately in 470 AD (1600 14C BP). These data refute the existing idea that it was generated in 1856. The monogenetic Veer cone should be cancelled from the catalogs of historical eruptions and active volcanoes in Kamchatka. The eruption of this cone was a reflection of the all-Kamchatkan increase in the activity of endogenous processes that occurred in 0–650 AD.

Nineteen Holocene eruptive centers (cinder cones with lava flows and maars) were located and described in the Avacha horst and anticline zone west of the East Kamchatka volcanic area. A tephrochronological study and the carbon-14 dating of soil and plant remains ranked the eruptive centers into three age groups: 11 000-7700, 3000-2500, and 1200-600 carbon-14 years B. P. The eruptive centers of these groups are believed to have been operating roughly synchronously with the periods of active magma injection in the East Kamchatka volcanic area. Eruptive histories were reconstructed for some of the volcanic centers. The structural and tectonic settings, geographical positions, and elevations of the centers were analyzed. The volume (1.1 km3) and weight (1.8 X 10^9 metric tons) of the erupted rocks were evaluated. The productivity of the plateau basalt volcanism was found to be 10-100 times lower than the plateau basalt productivity in the area of grabens and synclines, possibly, because of the more shallow basement in the horsts and because of the fact that the compression of the crust under uplifting conditions hampered the magma rise toward the surface. Most of the lavas and pyroclastics are basalts of the medium-potassic series, some having medium (54-62) and some elevated (65-70) Kmg values.

Кратер Чаша находится на Южной Качатке в центральной части лавового плато Толмачев дол района интенсивного базальтового вулканизма в плейстоцене-голоцене. Кратер сформировался 4628 ± 90 14С лет назад [9] во время мощного одноактного извержения. Продукты извержения представлены вблизи кратера мощной стратифицированной пачкой тефры, на удалении мощность горизонта быстро убывает. Тефра этого извержения [9] распространялась на северо-восток и покрывала территорию более 15000 км2. Общий объем тефры около 1.0-1.1 км3, в пересчете на плотную породу - 0.7-0.8 км3. Внешний облик ювенильных продуктов колеблется от светло-желтой хрупкой, пористой пемзы до светло-серых плотных, невспененных обсидианоподобных обломков. Однако химический состав всех разностей довольно однороден - это риолиты (73-75 вес. % SiO2) с повышенным содержанием К2О (до 3.8 вес. %). Все разности содержат небольшое количество вкрапленников (около 1%), представленных плагиоклазом, биотитом и, возможно, амфиболом. Сравнение химических характеристик изверженных продуктов кратера Чаша и Бараньего Амфитеатра на северном подножии вулкана Опала дает нам основания предположить, что оба извержения питались из одного долгоживущего кислого магматического очага, сформировавшегося около 30000-40000 14С л.н., перед образованием кальдеры вулкана Опала.